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Hạ Long Weather by Month
Average temperatures, rainfall and humidity for Hạ Long, Vietnam, month by month, built from OpenWeather’s historical records. Use it to see what a typical Hạ Long month looks like before you travel — then check the live Hạ Long forecast for the days ahead.
Warmest month
June
32°C average high
Coolest month
January
15°C average low
Wettest month
August
202 mm of rain
Driest month
February
29 mm of rain
Average temperature and rainfall in Hạ Long by month
Averages of the daily highs and lows recorded in each month, with total rainfall, mean humidity and mean wind speed.
| Month | Avg high | Avg low | Record low / high | Rainfall | Humidity | Wind |
|---|---|---|---|---|---|---|
| January | 20°C | 15°C | 4°C / 30°C | 33 mm | 82% | 11 km/h |
| February | 21°C | 16°C | 5°C / 29°C | 29 mm | 84% | 10 km/h |
| March | 24°C | 19°C | 10°C / 30°C | 55 mm | 86% | 9 km/h |
| April | 27°C | 22°C | 12°C / 33°C | 93 mm | 85% | 10 km/h |
| May | 30°C | 26°C | 19°C / 38°C | 81 mm | 85% | 13 km/h |
| June | 32°C | 27°C | 19°C / 39°C | 130 mm | 83% | 12 km/h |
| July | 32°C | 27°C | 23°C / 38°C | 156 mm | 85% | 11 km/h |
| August | 31°C | 26°C | 6°C / 37°C | 202 mm | 87% | 10 km/h |
| September | 31°C | 25°C | 21°C / 37°C | 139 mm | 86% | 10 km/h |
| October | 29°C | 23°C | 15°C / 35°C | 67 mm | 81% | 12 km/h |
| November | 26°C | 20°C | 11°C / 33°C | 33 mm | 81% | 11 km/h |
| December | 22°C | 16°C | 7°C / 28°C | 38 mm | 79% | 12 km/h |
Best time to visit Hạ Long
The most comfortable time to visit Hạ Long is generally March and November to December, balancing mild daytime temperatures against the driest stretch of the year. The city has a moderate seasonal swing and rain concentrates around August, totalling about 1,057 mm a year.
Travellers who prefer heat should aim for June, when highs average 32°C. August is the month to avoid if rain would spoil your plans — it averages 202 mm, roughly 7× the rainfall of the driest month (February).
Source: OpenWeather historical and statistical weather data. Values are long-term averages, not a forecast — see the Hạ Long forecast for what is happening now.